include(GetGitRevisionDescription)
get_git_head_revision(GIT_CONFIG_REFSPEC GIT_CONFIG_SHA1)
git_describe(GIT_VERSION_DESC)
git_head_date(GIT_CONFIG_DATE)
git_head_localmods(GIT_LOCAL_MODIFICATIONS)
if(GIT_LOCAL_MODIFICATIONS MATCHES ".*files changed.*")
  set(GIT_LOCAL_MODIFICATIONS " (with uncommitted code modifications ${GIT_LOCAL_MODIFICATIONS})")
endif()

string(TIMESTAMP CONFIGURE_DATE "%Y-%m-%d %H:%M" UTC)

## MAKE_MAP_ENTRY is a macro to facilitate placing items in the itk::BuildInformation class
##                /--------------------------_---------------------------_-------------------------------------------------/
##                |    KEY                   |    VALUE                  | Description of value                            |
##                \--------------------------\---------------------------\-------------------------------------------------\
set(MAPPING_VALUES
    "
  MAKE_MAP_ENTRY( \"PROJECT_URL\",           \"https://www.itk.org\",      \"The URL of project.\"                     );
  MAKE_MAP_ENTRY( \"VERSION\",               \"${ITK_VERSION}\"    ,      \"The version at configuration time.\"      );
  MAKE_MAP_ENTRY( \"CONFIGURE_DATE\",        \"${CONFIGURE_DATE}\",       \"The date of configuration.\"              );

  MAKE_MAP_ENTRY( \"GIT_CONFIG_SHA1\",       \"${GIT_CONFIG_SHA1}${GIT_LOCAL_MODIFICATIONS}\",
                                                                               \"The git HEAD SHA1 has at configuration.\");
  MAKE_MAP_ENTRY( \"GIT_CONFIG_REFSPEC\",    \"${GIT_CONFIG_REFSPEC}\",   \"The git HEAD ref spec.\"                  );
  MAKE_MAP_ENTRY( \"GIT_CONFIG_DATE\",       \"${GIT_CONFIG_DATE}\",      \"The git HEAD date\"                       );
  MAKE_MAP_ENTRY( \"GIT_VERSION_DESC\",      \"${GIT_VERSION_DESC}\",     \"The git HEAD version tag-commits-hash\"   );

  MAKE_MAP_ENTRY( \"CMAKE_VERSION\",         \"${CMAKE_VERSION}\",        \"The version of cmake used to configure.\");
  MAKE_MAP_ENTRY( \"CMAKE_GENERATOR\",       \"${CMAKE_GENERATOR}\",      \"The generator used for building.\"        );
  MAKE_MAP_ENTRY( \"CMAKE_BUILD_TYPE\",      \"${CMAKE_BUILD_TYPE}\",     \"The build type requested.\"               );

  MAKE_MAP_ENTRY( \"CMAKE_C_COMPILER_ID\",   \"${CMAKE_C_COMPILER_ID}\",  \"The C compiler ID used for building.\"    );
  MAKE_MAP_ENTRY( \"CMAKE_C_COMPILER_VERSION\",   \"${CMAKE_C_COMPILER_VERSION}\",
                                                                          \"The C compiler version used for building.\"    );
  MAKE_MAP_ENTRY( \"CMAKE_C_COMPILER\",      \"${CMAKE_C_COMPILER}\",     \"The C compiler.\"                       );
  MAKE_MAP_ENTRY( \"CMAKE_C_FLAGS\",         \"${CMAKE_C_FLAGS} ${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}}\",
                                                                          \"The C compiler flags.\"                 );

  MAKE_MAP_ENTRY( \"CMAKE_CXX_STANDARD\",    \"${CMAKE_CXX_STANDARD}\",   \"The CXX standard specified.\"             );
  MAKE_MAP_ENTRY( \"CMAKE_CXX_COMPILER_ID\", \"${CMAKE_CXX_COMPILER_ID}\",\"The CXX compiler ID used for building.\"  );
  MAKE_MAP_ENTRY( \"CMAKE_CXX_COMPILER_VERSION\",   \"${CMAKE_CXX_COMPILER_VERSION}\",
                                                                          \"The CXX compiler version used for building.\"  );
  MAKE_MAP_ENTRY( \"CMAKE_CXX_COMPILER\",    \"${CMAKE_CXX_COMPILER}\",   \"The CXX compiler.\"                       );
  MAKE_MAP_ENTRY( \"CMAKE_CXX_FLAGS\",       \"${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}}\",
                                                                          \"The CXX compiler flags.\"                 );
")

configure_file(itkBuildInformation.cxx.in ${ITKCommon_BINARY_DIR}/itkBuildInformation.cxx)
#[COPYONLY] [ESCAPE_QUOTES] [@ONLY]
#[NEWLINE_STYLE [UNIX|DOS|WIN32|LF|CRLF] ])

set(ITKCommon_SRCS
    ${ITKCommon_BINARY_DIR}/itkBuildInformation.cxx
    itkCommonEnums.cxx
    itkMemoryProbesCollectorBase.cxx
    itkCreateObjectFunction.cxx
    itkLogger.cxx
    itkLogOutput.cxx
    itkLoggerOutput.cxx
    itkProgressAccumulator.cxx
    itkTotalProgressReporter.cxx
    itkNumericTraits.cxx
    itkHexahedronCellTopology.cxx
    itkIndent.cxx
    itkEventObject.cxx
    itkFileOutputWindow.cxx
    itkSimpleFilterWatcher.cxx
    itkNumericTraitsVectorPixel.cxx
    itkObject.cxx
    itkQuadrilateralCellTopology.cxx
    itkIterationReporter.cxx
    itkMemoryProbe.cxx
    itkTextOutput.cxx
    itkNumericTraitsTensorPixel2.cxx
    itkNumericTraitsFixedArrayPixel2.cxx
    itkProcessObject.cxx
    itkStreamingProcessObject.cxx
    itkSpatialOrientationAdapter.cxx
    itkRealTimeInterval.cxx
    itkOctreeNode.cxx
    itkNumericTraitsFixedArrayPixel.cxx
    itkMultiThreaderBase.cxx
    itkPlatformMultiThreader.cxx
    itkMetaDataObject.cxx
    itkMetaDataDictionary.cxx
    itkDataObject.cxx
    itkThreadLogger.cxx
    itkNumericTraitsTensorPixel.cxx
    itkCommand.cxx
    itkNumericTraitsPointPixel.cxx
    itkLightObject.cxx
    itkStdStreamLogOutput.cxx
    itkLightProcessObject.cxx
    itkRegion.cxx
    itkImageIORegion.cxx
    itkImageSourceCommon.cxx
    itkImageToImageFilterCommon.cxx
    itkImageRegionSplitterBase.cxx
    itkImageRegionSplitterSlowDimension.cxx
    itkImageRegionSplitterDirection.cxx
    itkImageRegionSplitterMultidimensional.cxx
    itkVersion.cxx
    itkNumericTraitsRGBAPixel.cxx
    itkRealTimeClock.cxx
    itkMetaDataObjectBase.cxx
    itkCovariantVector.cxx
    itkMemoryUsageObserver.cxx
    itkMersenneTwisterRandomVariateGenerator.cxx
    itkLoggerBase.cxx
    itkNumericTraitsCovariantVectorPixel.cxx
    itkProgressReporter.cxx
    itkExceptionObject.cxx
    itkMultipleLogOutput.cxx
    itkQuadraticTriangleCellTopology.cxx
    itkTimeProbesCollectorBase.cxx
    itkSmapsFileParser.cxx
    itkTriangleCellTopology.cxx
    itkVector.cxx
    itkRealTimeStamp.cxx
    itkDirectory.cxx
    itkLoggerManager.cxx
    itkTimeProbe.cxx
    itkNumericTraitsRGBPixel.cxx
    itkTimeStamp.cxx
    itkSingleton.cxx
    itkTetrahedronCellTopology.cxx
    itkThreadedIndexedContainerPartitioner.cxx
    itkObjectFactoryBase.cxx
    itkFloatingPointExceptions.cxx
    itkOutputWindow.cxx
    itkNumericTraitsDiffusionTensor3DPixel.cxx
    itkEquivalencyTable.cxx
    itkXMLFileOutputWindow.cxx
    itkXMLFilterWatcher.cxx
    itkStoppingCriterionBase.cxx
    itkCompensatedSummation.cxx
    itkArrayOutputSpecialization.cxx
    itkNumberToString.cxx
    itkRandomVariateGeneratorBase.cxx
    itkMath.cxx
    itkProgressTransformer.cxx
    itkSymmetricEigenAnalysis.cxx
    itkExtractImageFilter.cxx
    itkLoggerThreadWrapper.cxx
    itkFrustumSpatialFunction.cxx
    itkObjectStore.cxx
    itkGaussianDerivativeOperator.cxx
    itkSpatialOrientation.cxx
    itkAnatomicalOrientation.cxx
)

if(ITK_WRAP_PYTHON)
  list(APPEND ITKCommon_SRCS itkPyCommand.cxx)
endif()

if(WIN32)
  list(APPEND ITKCommon_SRCS itkWin32OutputWindow.cxx)
endif()
if(ITK_USE_WIN32_THREADS OR ITK_USE_PTHREADS)
  list(
    APPEND
    ITKCommon_SRCS
    itkPoolMultiThreader.cxx
    itkThreadPool.cxx)
endif()

if(ITK_DYNAMIC_LOADING)
  list(APPEND ITKCommon_SRCS itkDynamicLoader.cxx)
endif()

if(ITK_USE_TBB)
  list(APPEND ITKCommon_SRCS itkTBBMultiThreader.cxx)
endif()

# Prevent optimization from affecting the floating point calculation.
if(CMAKE_CXX_COMPILER MATCHES "^icc")
  if(WIN32)
    set_source_files_properties(itkCompensatedSummation.cxx PROPERTIES COMPILE_FLAGS /fp precise)
  else()
    set_source_files_properties(itkCompensatedSummation.cxx PROPERTIES COMPILE_FLAGS -fp-model precise)
  endif()
elseif(CMAKE_COMPILER_IS_GNUCXX)
  # -fno-associative-math appears to only be present in GCC 4.3 onwards.
  include(CheckCXXCompilerFlag)
  check_cxx_compiler_flag(-fno-associative-math gcc_has_no_associative_math)
  if(gcc_has_no_associative_math)
    set_source_files_properties(itkCompensatedSummation.cxx PROPERTIES COMPILE_FLAGS -fno-associative-math)
  else()
    set_source_files_properties(itkCompensatedSummation.cxx PROPERTIES COMPILE_FLAGS -fno-unsafe-math-optimizations)
  endif()
elseif(MSVC)
  set_source_files_properties(itkCompensatedSummation.cxx PROPERTIES COMPILE_FLAGS -fp:precise)
endif()

### generating libraries
itk_module_add_library(ITKCommon ${ITKCommon_SRCS})

target_link_libraries(
  ITKCommon
  LINK_PUBLIC
  itksys
  ITKVNLInstantiation)

if(UNIX)
  target_link_libraries(
    ITKCommon
    LINK_PUBLIC
    ${CMAKE_THREAD_LIBS}
    -lm)
  if(ITK_DYNAMIC_LOADING)
    target_link_libraries(ITKCommon LINK_PUBLIC ${CMAKE_DL_LIBS})
  endif()
endif()

if(ITK_USE_TBB)
  # https://software.intel.com/en-us/node/506139
  # The macro TBB_DEPRECATED controls deprecated features.
  #      Define it to 0 to remove deprecated Intel® Threading Building Blocks (Intel® TBB) 2.1 interfaces.
  target_compile_definitions(ITKCommon PUBLIC TBB_DEPRECATED=0)
  # The macro TBB_USE_CAPTURED_EXCEPTION controls rethrow of exceptions within the library.
  #      Define TBB_USE_CAPTURED_EXCEPTION=0 to request rethrow of the exact exception.
  target_compile_definitions(ITKCommon PUBLIC TBB_USE_CAPTURED_EXCEPTION=0)
endif()
